It depends on what you mean by "cute". If it is "pretty" for a girl, it would be "eres guapa" or "eres bonita" or "eres atractiva". For a boy, "eres guapo" or "eres atractivo". If you mean "precious" or "darling", "eres cuco". Example: "That's a cute sweater" would be "es un suéter cuco".
Translated from English to Spanish its 'el es tan lindo. This is how you say he is, so cute in Spanish.
You can say "Él es muy mono."
Tierna y pequeña
You could say "Él es tan guapo".
There are a number of adjectives that can mean "cute" including guapo/guapa, lindo/linda (can mean lovely) and atractivo/a.
Translated from English to Spanish its 'el es tan lindo. This is how you say he is, so cute in Spanish.
lindo
Tómate tu tiempo.
Eso es precioso.
linda foto
You can say "Él es muy mono."
Tierna y pequeña
Roughly - soy lindo
ella es linda
Un Cachorro mono (:
Los chicos son lindos.
eres hermosa y linda